每週一題102.05.22

 

設x>0，y>0，且x+2y=6，則下列敘述哪些是正確的？

(1) 當數對(x,y)=(2,2)時，  2times有最小值

(2) 當數對(x,y)=(2,2)時，fraction 有最小值

(3) 當數對(x,y)=(4,1)時，exp 有最小值

(4) 當數對(x,y)=(4,1)時，log 有最大值

 

﹝出自翰林出版_指考週複習﹞

Date Posted: 21 May 2013 @ 10 36 PM
Last Modified: 21 May 2013 @ 10 54 PM
Posted By: hs_math
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